ceph/src/boost/libs/smart_ptr/include/boost/smart_ptr/detail/atomic_count.hpp

   1 #ifndef BOOST_SMART_PTR_DETAIL_ATOMIC_COUNT_HPP_INCLUDED
   2 #define BOOST_SMART_PTR_DETAIL_ATOMIC_COUNT_HPP_INCLUDED
   3
   4 // MS compatible compilers support #pragma once
   5
   6 #if defined(_MSC_VER) && (_MSC_VER >= 1020)
   7 # pragma once
   8 #endif
   9
  10 //
  11 //  boost/detail/atomic_count.hpp - thread/SMP safe reference counter
  12 //
  13 //  Copyright (c) 2001, 2002 Peter Dimov and Multi Media Ltd.
  14 //  Copyright (c) 2013 Peter Dimov
  15 //
  16 //  Distributed under the Boost Software License, Version 1.0.
  17 //  See accompanying file LICENSE_1_0.txt or copy at
  18 //  http://www.boost.org/LICENSE_1_0.txt
  19 //
  20 //  typedef <implementation-defined> boost::detail::atomic_count;
  21 //
  22 //  atomic_count a(n);
  23 //
  24 //    (n is convertible to long)
  25 //
  26 //    Effects: Constructs an atomic_count with an initial value of n
  27 //
  28 //  a;
  29 //
  30 //    Returns: (long) the current value of a
  31 //    Memory Ordering: acquire
  32 //
  33 //  ++a;
  34 //
  35 //    Effects: Atomically increments the value of a
  36 //    Returns: (long) the new value of a
  37 //    Memory Ordering: acquire/release
  38 //
  39 //  --a;
  40 //
  41 //    Effects: Atomically decrements the value of a
  42 //    Returns: (long) the new value of a
  43 //    Memory Ordering: acquire/release
  44 //
  45
  46 #include <boost/config.hpp>
  47 #include <boost/smart_ptr/detail/sp_has_sync.hpp>
  48
  49 #if defined( BOOST_AC_DISABLE_THREADS )
  50 # include <boost/smart_ptr/detail/atomic_count_nt.hpp>
  51
  52 #elif defined( BOOST_AC_USE_STD_ATOMIC )
  53 # include <boost/smart_ptr/detail/atomic_count_std_atomic.hpp>
  54
  55 #elif defined( BOOST_AC_USE_SPINLOCK )
  56 # include <boost/smart_ptr/detail/atomic_count_spin.hpp>
  57
  58 #elif defined( BOOST_AC_USE_PTHREADS )
  59 # include <boost/smart_ptr/detail/atomic_count_pt.hpp>
  60
  61 #elif defined( BOOST_SP_DISABLE_THREADS )
  62 # include <boost/smart_ptr/detail/atomic_count_nt.hpp>
  63
  64 #elif defined( BOOST_SP_USE_STD_ATOMIC )
  65 # include <boost/smart_ptr/detail/atomic_count_std_atomic.hpp>
  66
  67 #elif defined( BOOST_SP_USE_SPINLOCK )
  68 # include <boost/smart_ptr/detail/atomic_count_spin.hpp>
  69
  70 #elif defined( BOOST_SP_USE_PTHREADS )
  71 # include <boost/smart_ptr/detail/atomic_count_pt.hpp>
  72
  73 #elif defined( BOOST_DISABLE_THREADS ) && !defined( BOOST_SP_ENABLE_THREADS ) && !defined( BOOST_DISABLE_WIN32 )
  74 # include <boost/smart_ptr/detail/atomic_count_nt.hpp>
  75
  76 #elif !defined( BOOST_NO_CXX11_HDR_ATOMIC )
  77 # include <boost/smart_ptr/detail/atomic_count_std_atomic.hpp>
  78
  79 #elif defined( __GNUC__ ) && ( defined( __i386__ ) || defined( __x86_64__ ) ) && !defined( __PATHSCALE__ )
  80 # include <boost/smart_ptr/detail/atomic_count_gcc_x86.hpp>
  81
  82 #elif defined( BOOST_SP_HAS_SYNC )
  83 # include <boost/smart_ptr/detail/atomic_count_sync.hpp>
  84
  85 #elif defined(WIN32) || defined(_WIN32) || defined(__WIN32__) || defined(__CYGWIN__)
  86 # include <boost/smart_ptr/detail/atomic_count_win32.hpp>
  87
  88 #elif defined(__GLIBCPP__) || defined(__GLIBCXX__)
  89 # include <boost/smart_ptr/detail/atomic_count_gcc.hpp>
  90
  91 #elif !defined( BOOST_HAS_THREADS )
  92 # include <boost/smart_ptr/detail/atomic_count_nt.hpp>
  93
  94 #else
  95 # include <boost/smart_ptr/detail/atomic_count_spin.hpp>
  96
  97 #endif
  98
  99 #endif // #ifndef BOOST_SMART_PTR_DETAIL_ATOMIC_COUNT_HPP_INCLUDED